bellows



`steam-engine, andto the peculiar mode of operating the same.

@witch tizteeatwt @ffice Lettere Patent No. 74,039, dated Februaryd, 1868,

IMPROVEMENT IN 'STEAM-ENGINES.

dlgs -tlgrhule rrfrrnh in im tlgrs lttrrs nteut mit uniting mrt nf its anni.

KNOW ALL MEN BY, THESEPRESENTS:

That I,4 E. H. BELLOWS, of the city and county of Worcester, and Commonwealth of Massachusetts, have l invented certain new and useful Improvements in Steam-Engines; and I do hereby declare that the following is n full, clear, and exact description of the same, reference beingl had to the accompanying drawings, forming a part of this specification, in whichl Figure represents so much of a steam-engine as is necessary to illustrate my present improvements.

Figure 2 represents a side view of the same parts, withthe glass windows and their frame removed.

Figure B represents a section online A B, g. 1.

Figure 4` represents a section on line C D, g. 1; and

Figure 5 represents a section on line E F, g.;1.

To enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describe it morc in detail. Y y

My present :improvements relate to the peculiarrclativearrangement of the steam and exhaust-valves of a In 'the drawings,'A represents the shell or case containing the steam-cylinder, the heads of which are shown at B B'. The steam and exhaust-valves are arranged in the ends C C. D D represent the rods which operate the steam-valves, and E E represent the rods which operate the exhaust-valves. These rods are packed at a a a a in the usual manner.. The inner ends of the rods D D are supported and work in the bearings F F, while their extreme ends rest against the cam G, loose en the hollow shaft II. The cam G is fastened to the spindle I by a pin, b, the ends of which Work in slots, c c, iu the tubular or hollow shaft II, which slots, c c, are of sufficient lengthrto'permit of the cam G being raised and lowered a distance equal to its entire length, less 'the thickness of the valve-rods, to give agreater or less motion to the rods D D, which operate the steam-valves. rIhe inner ends of the exhaust-valve rods E E are supported and work in bearings J J, and are connected by the `bridge-piece K, which is also held in place by passing through the bearing-pieces J J, as fully shown in tig..

5 of the accompanying drawings. Motion is imparted to the rods E E, and through them to the exhaust-valves, by the cam L, on the lower Vend of shaft H. The upper' end of the spindle or rod I is to be connected iu any proper manner to the adjusting-rod of a regulator, while the tubularshaft is to berevolvcd by the mechanism of the engine when in motion.

The operation is as follows: After the engine has been started in the usual. manner', the regulator-will elevate or depress rod or spindle I and cam-G, according as more orlcss steam may be required.' If steam isl required, during a full stroke, to keep up the proper speed, then the regulator elevates rod I and cam G to the highest point, thereby causing the rods D D of the steam-valves to work to their ,fullest extent, but, if a less quantity of steam is required, then theiregulator elcvates the rod I and cam G to a less height. When the cam G is dcpressedto its lowest point, the steam does not pass at all, there being no motion to the steamfvalves.

The arrangement of the steam and exhaust-valves is such that the mechanism for operating them can be made veryeompactly, and all enclosed in the chamber M, between the ends C C, the front of which is 'covered by the, frame N, provided with glass windows O O, whereby the valve-rods, and the mechanism for Working them, are woll and securely protected from all' dust and dirt, while, at the same time, the mechanism isexposed to view, and the operation of the same can be examined and inspected without removing the frame N.. I l

Having described my improvements in steam-engines, what Ivclaim'therein as new and ot' my invention, and desireto secure by Letters Patent, isn 1. The arrangement of the valve-rods D D and E E, in the chamber M, and in relation to cach other, substantially as and for the purposes set forth.

'2. The combination, with thevvalve-rods D D and E E, ot` the shaft H, spindle I, and cams G and L, substantially and for the purposes set `forth. l

E. H. BELLOWS.

Witnesses:

Geo. H. MILLER, D. L, Minnen. 

